Pneumatic tool.



.@Be-itjknfown"x` at AI, n V

woon, a citizenfof the United States, residf STATES PATENT oFiIoE w.smwoon, or FRANKLIN, PENNSYLVANIA, AssmNon To cmoauo monture TOOLconPANY, olf-emesso, ILLINOIS, a coaronaTIoN or Nrw- JERSEY.

Wammes.-mammie Toall y ing at, Franklin, the' coun i `o1Yenango and`State ofJ lfennsylvania, ave invented certain r new andi, useful`Iinproveii,lents inA situando of Letter maar,

, r'NnUnaTIo Toor..

which is here inthe orm of a ball 11.`

Apistonr chamber is also in. koo mmiinicatio Pneumaticf'lfoolafofwhichfollowing is "V 10 y therefore comm 80 am handfaiininnaedmamgparticultrly.

a specification'.

l ,My inventionfrelates to tools operated by a motive-vfluidmusally,compressed air and "1111?- called ,Pneumatic tools.

invention i, but showingf ythe ,handle nien; Figc, 2 a, detail-view-of h`strllcture4 at 190; to the f ber* will be placed at 'e'xhausftfm 'phereand will be rapidlyexh` thel result that the live' motivefiiidvin thelcorners. ofithe valve cageon the left hand` `with the atmospherethrough suitable `and passages hereinafter moreplarticu arly described.

Patented lim-25, 191'?. 1914, serial Nb. saam.` Divided una thisappunti@ ma nana 11,1915; semina. 13,556. l

When the parts are in the relativepossii: tion shown inFig.- 1 withthejball valve in its left hand position, the liveinotive iluid entersthe connection 10 V,and passesthrough f vthe ports 12 in the valveca13,l through d port 14` inthe right hand-'va `veulent 15 and fthrough'passages 16 and `17 Vto the. front end 'ofy the piston chamberjwityhft 'rA therpistoia` is;,reciprocated` PSiton, that:` isftotheleftln .A l

''l`hepiston' chamber isprovif ed on' 'its tonin its Vrearward trave`inner. `walls with twoan'nular" Aves 18 L, andf"j19 -communicatin wiwel i exhaust the pis` groove 18, the front end of the `c :lainwith.l

fava reck I'drillntimi it will 'be understood, n

l .if th'atmy ,inveiitionis not to bialiiiiiteltheretoua'ndthatlvflcontemplate' using the saine wherever applicable.

' "'Jltefex'ring'` to. theparticular embodiment of my iiiventionasherein shown, the drill com-- priseswa `maintcylinder 1, having-a pistoni 1 chamben, a piston 3 v,leciprocable therein and having` af hammeringportion or stem 3*, awstrikingpiece or anvil 4, a drill bit 5 having y yy front he'adf,l a` drill chuck or socket 7 (which `in l, the presentinstance is rotatable) ,and a suitable handle 8 secilred .t-the cyl--inder -byf the siderods 9 which alsoserve to clalrrpandthold the fronthead. In Fig. 2

' `I have shownone side of the tool structure with a side with onefside`rod only, but-it-will be u nderstood that therothersdeis similarlyequipped The pistoni-,chamber 2 has comir'unication with i he-livemotive Huid, such as compressed a.ir,`eutarin3 the inletconnection acentral longitudinal passage 5,, a-

right and force it upo'nlitfsl seat'llio close i:lfieflportf14,4 itbeing that the inlet` ports12` are of restricted 4ca 'l trying capacityas comparedlwith `the 'and pasl -left of the balll ,valve will "operatesuch valve` f asdescribedg y being now seated uponthe seat The valve 15,the inlet port 22 in the other seat 23 leo will now be opened and thelivemotive fluid y Awill flow therethrough and through vthe port 24 tothe rear end of the piston' chamber. As a result the piston will bereciprocated forwardly and its stem 3 will strike against the pieceoranvil 4 which will im art. its blow to the drill bit 5. At this time thepiston is in the position shown in Fig. 1 and the rearward end of thechamber is now Vat exhaust through the' groove 19 and exhaust port 21,the ball valve beingshown as just having been 'thrown to the left toadmit the motive fluid to the front end of the piston chamber. Y,

-The exhaust ports 20 and 21 do not conimunicate directly to the'atmosphere but through a band -operated )Valve 1n the form iodo of ashell 25 open at one end and closed at the other and arranged tooscillate in a chamber formed in a casing '26 extending longitudinallyof the cylinder 1. This valve is adapted to be manually operated bymeans of a handle 27 secured to the closed or solid end of the valve andarranged to move through a slot 28 in the outer wall of the casingv 26a`This slot is provided along one edge with notches 28* into which thehandle is spring ferent ad].usted positions. -As shown, a spring 29 isinterposed between a pin or stud 3() rotatably connected with the solidend of the valve'and a plug 31 at the outer end of the casing 26.According to this construction, the valve 25 may b'e oscillated by meansof the handle 27 so as to bring the exhaust ports 20 and 21 out'ofregister with the ports 32 and 33 respectively of such. valv'e, therebyshutting 'off the exhaust..

When the handle 27 is released, the spring 29 will move the valve 25slightly lon "tudinally-4 into engagement with one o the notchesj28. Inrestoring. the valve 25 to openjbr exhaust position, the reverseoperation vItakes place, that is, the valve 25' is' movedslightlyrearwardly to bring its handle ,outof the notch 28* and isthen swung toopen position. When this p'osition. is

reached then the operators hold on the valve 27 is'released, and-thespring 29 will force sucli handle into the other notches 28, therebyretaining such valve in its open' .or exh ustposition.

Ahe exhaust shut-oil valve 25 is proa vided for the purpose of enabliiithe 'm tive-fluid to be discharged throu the. drill bit at the willofthe operator an to thereby blow out the cuttings in the bottom of thehole made by the bit. As shown, this bit isgrooves or flattenings 3, inorder to ermit' the motive fluid at the front end of t e pisl ton'chamber to pass by such stem and 'through passa' es -1 and 5a to thecutting end of the dri l bit or steel. It will be understood that thepassage 4 is of limited carrying capacity'in order not to interfere withthe reciprocations of the piston 3. Every time the motive fluid isadmitted to the front end of the piston chamber, a portion thereof thuspasses through the anvil and through the hollow steel for the purposestated.

In the event that the supplyl of air-delivered to the cutting end of thedrill bit is insufficient so that the hole is not being properly clearedof chips or cuttings, the shut-oil valvel 25 is closed. The piston 3will travel rcar\\'ardly but upon reaching its rearward position, therebeing no 00mpressed and thereby held in difplete release of the motivefluid to throw the .ball valve, the motive fluid will continue to flowthrough the anvil and through the drill bit to e'ect the chips orcuttings. By these means, t e piston 3 is rendered in operative and adirect and continuous snpp y of air is. delivered from the inlet 10through .the tool and to the cutting end of the drill 't. y .v

Itl will understoodthat the rotation mechanimi for rotating the drillchuck forms rio part of my present inventiom'the .mediate .itslengtliaiidfgoverned by the pis- V.ton and 'exhaust-:groove and port,a'l valve arranged alongsideftle cylinder and on the exteriorthereofland having a port-adapted to .communicate wthfffsaidlast-mentipncd vexhaust port adapted to be oscillated to close the same,and a drill'bit havin alongitudinal. passagel for the motive uid fromthe front end of the l`cylinder toits cutting 2. The combination -of acylinder'havin 4ports and passages-for the admission an exhaust of themotive' fluid, a pistn reciprocable therein, a distributin trolling theadmission of the motive fluid t0 the cylinder, said vcyli'n'der haYingintermediate its lengt@ and governed by the pistonan exhaustgrdoveandport, an auxliary cylinder arranged. parallel with said. lirstmentioned'cylinder and open'lat its :forward end andadapted to communicatewithsaid last-mentioned exhaust port, a shell'valve arranged tooscillate in the auxiliary cylinder and hav-ing a pprt-n9rmally communi-11i eating with the.latter exhaust 'port and adapted to close thesame-,and a drill bit having a longitudinal passage for the motive fluidfrom the front and of the cylinder to .its cutting end.'

The combination of a cylinder having ports and passages for theadmission and exhaust of the motive fluid, -a piston reciprocabletherein, a distributing valye controlling the admission of the motivefluid 12 to the cylinder, said cylinder having intermediate its lengthand governed b the pi ston, two parallel circumferentia grooves andexhaust ports therefrom through the" cylinder wal'lsga shell valvearranged alog- 1:

vaLve con- 1015 10 exhaust of, the motive fluid, a piston reeiprocabletherem, a distributing .valve 'con- 4trolling the admission of themotive fluid to the cylinder, said cylinder having intermediate itslength and governed by the plston an exhaustort, a, valve arrangedalongside the cylinr er exteriorly thereof and.

adapted to be oscillated to close the exhaust portLand a drill bithav-ing a longitudinal passa e for-the motive fluid from the front end othe cylinder to its cuttin end.

MATHER W. SHEIWOOD. Witnesses;

JOHN B. WILLIAMS, PAUL G. HEATH.

